Random num1 = 0.237788 Random num2 = 0.291066 Random num3 = 0.845814 srand( [Expr] ) 将rand 函数的种子值设置为 Expr 参数的值,或如果省略 Expr 参数则使用某天的时间。返回先前的种子值。 $ awk 'BEGIN { param = 10 printf "srand() = %d\n", srand() printf "srand(%d) = %d\n", param...
rn=randint(c+3*2) # generate new random number } while (rn in a) # until a unique number is obtained } a[rn]; $4=rn # add new random number as last field }1' file 示例输出: 123 A,B,C,0 E,F,G,6 H,I,J,5 awk进行救援! 您要添加的不是随机数而是序列号(随机数可能...
or seed, each time you run awk. Thus, a program generates the same results each time you run it. The numbers are random within one awk run but predictable from run to run. This is convenient for debugging, but if you want a program to do different things each time ...
就不再会继续whlie循环,然后打印该变量,在bash中 ${#var} 就是获取变量的长度,我们再看看怎么实现的随机,该shell的原理是读取 line 变量的随机0~6位置长度为1的字符,环境变量RANDOM,范围是0~32767,RANDOM对7取余的结果是0~6,就能随机抽取长度为7的字符串中的任意一个字符,然后把该字符累计给变量...
要获得两个输入之间的随机整数值的良好分布,可以使用awk结合随机数生成函数来实现。下面是一个示例awk脚本: 代码语言:txt 复制 BEGIN { srand(); # 初始化随机数种子 min = 1; # 最小值 max = 100; # 最大值 } { # 生成随机整数 random_int = int(min + rand() * (max - min + 1)); ...
导入random模块生成随机数字 import random 导入CSV模块,用于数据写入到CSV import csv 创建一个空列表,后面可以把生成的用户名、密码、身份证号码存放进来 list = [] 把CSV文件绝对路径赋值给一个变量 file_path = 'user_id.csv' 从1开始循环100次
In most awk implementations, including gawk,rand()starts generating numbers from the same starting number, or seed, each time you run awk. Thus, a program generates the same results each time you run it. The numbers are random within one awk run but predictable from run to run. This is ...
In most awk implementations, including gawk,rand()starts generating numbers from the same starting number, or seed, each time you run awk. Thus, a program generates the same results each time you run it. The numbers are random within one awk run but predictable from run to run. This is ...
291066 Random num3 = 0.845814sin(expr)正弦函数返回角度 expr 的正弦值,角度以弧度为单位。示例如下: [jerry]$ awk 'BEGIN { PI = 3.14159265 param = 30.0 result = sin(param * PI /180) printf "The sine of %f degrees is %f.\n", param, result }'执行上面的命令可以得到如下的结果: ...
len="5"whileread line;dostr=""while["${#str}"-lt"$len"];doletter="${line:$(($RANDOM%${#line})):1}"str="$str$letter"done echo $str done<file [解析] 同样,这个shell脚本也能实现该功能,首先定义变量 len=5,因为只需要5列嘛。然后从file文件中读入一行内容给变量 line ,定义一个长度为...